At the "set monitor type" menu of the AIX PS/2 boot program,
select 8514A with 8514 (16" color display) even though you
have an 8507. It will work fine. As you've found out,
specifying an 8507 won't work with X11.
--
Steve Dyer
dyer at ursa-major.spdcc.com aka {ima,harvard,rayssd,linus,m2c}!spdcc!dyer
dyer at arktouros.mit.edu, dyer at hstbme.mit.edu